On paper it does sound quite promising, but looking at the Github repo I can't help but shake the feeling that it is more talk than action. It seems to have basically been abandoned before it ever saw any adoption?
Most of the profiles being argued for C++ only exist in PDF form, there isn't a single C++ compiler where you can validate those ideas, but trust the authors, the ideas will certainly work once implemented.
I don’t know about real world adoption, nor do I think it’s really about what I’m saying. The proposal was made public a few weeks ago. There hasn’t been much time for real world projects to adopt it, if that were even the goal. The point is that it does exist today, and you can try it out. It’s more than just a design on paper.
He single handedly wrote his own C++ front-end and then proceeded to implement a butt load of extensions which other members of the committees poo-pood as being to hard to implement in the compiler.
Every couple of weeks he implements something new. He's a real joy to follow.